Pith Number

pith:5P4V6TCJ

pith:2019:5P4V6TCJB6XSSM4HURW5UXR2ZR

not attested not anchored not stored refs pending

New constructions of unexpected hypersurfaces in $\mathbb{P}^n$

Brian Harbourne, Halszka Tutaj-Gasi\'nska, Juan Migliore

arxiv:1904.03251 v1 · 2019-04-05 · math.AG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5P4V6TCJB6XSSM4HURW5UXR2ZR}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:49:14.100024Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ebf95f4c490faf293387a46dda5e3acc7e42dba4f8cdb0ec195db2d4c36a0868

Aliases

arxiv: 1904.03251 · arxiv_version: 1904.03251v1 · doi: 10.48550/arxiv.1904.03251 · pith_short_12: 5P4V6TCJB6XS · pith_short_16: 5P4V6TCJB6XSSM4H · pith_short_8: 5P4V6TCJ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/5P4V6TCJB6XSSM4HURW5UXR2ZR \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: ebf95f4c490faf293387a46dda5e3acc7e42dba4f8cdb0ec195db2d4c36a0868

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a676ba02c7fecb9aebbbd0ff9becd56c098d1d8d9144ad7de752e965403b3337",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-04-05T19:44:35Z",
    "title_canon_sha256": "455fcb5faa04500b6e4d44b12327826dfdb18c0f619558f856b18c35d6fed088"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.03251",
    "kind": "arxiv",
    "version": 1
  }
}